|Quadrangle map, 1:250,000-scale||NB|
|Quadrangle map, 1:63,360-scale||A-3|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the nose of the ridge along the west side of lower Ramshole Creek. It is at an elevation about 5,500 feet, 2,200 feet west of Ramshole Creek. The occurrence is in the SW1/4 of section 17, T. 4 N., R. 17 E. of the Copper River Meridian. This record includes National Park Service locality WRST-52 (unpublished data) which is approximately located on Ramshole Creek. This occurrence is probably located to within several thousand feet.|
Geologic descriptionRichter and Matson (1969) found massive, dark- gray barite float at this site; the float is probably nearly in place. National Park Service locality WRST-52 (unpublished data) is identified as a gold prospect here or near here. Bedrock in the area is siliciclastic sedimentary rocks of the Permian Eagle Creek Formation (Richter, 1976). Triassic gabbro intrusions are common in this formation and locally make up to 70 percent of the section (Richter, 1971 [I-655]).
|Geologic map unit||(-142.35542846988, 62.1221207600333)|
|Mineral deposit model||Stratiform or vein barite?|
|Age of mineralization||Permian? May be the age of the host sedimentary rocks.|
|Workings or exploration||Probably only surface examination.|
|Indication of production||None|
Additional commentsThe occurrence is in the Wrangell-St. Elias National Preserve.
Richter, D.H., 1976, Geologic map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-932, 1 sheet, scale 1:250,000.
|Reporters||Travis L. Hudson (Applied Geology)|
|Last report date||11/24/2002|